CN216483929U - Pressure test tool for high-pressure large-caliber welded end valve - Google Patents
Pressure test tool for high-pressure large-caliber welded end valve Download PDFInfo
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- CN216483929U CN216483929U CN202123405900.9U CN202123405900U CN216483929U CN 216483929 U CN216483929 U CN 216483929U CN 202123405900 U CN202123405900 U CN 202123405900U CN 216483929 U CN216483929 U CN 216483929U
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Abstract
The utility model belongs to the technical field of the valve test, specifically disclose a high pressure heavy-calibre welded end valve is with pressure testing frock aims at solving the inconvenient centre gripping of high pressure heavy-calibre welded end valve on the pressure testing machine, and connects the problem that clamping-force is less than the produced thrust of test pressure. The pressure test tool comprises a pressure test back plate, a pull rod, a clamping assembly and a locking piece. This pressure testing frock can cooperate the link of installing at high-pressure heavy-calibre welded end valve, guarantee the leakproofness when strengthening its structural strength, so that with high-pressure heavy-calibre welded end valve centre gripping on the pressure testing machine, and can reduce the produced thrust of test pressure, guaranteed that the clamping-force of pressure testing machine to the valve is greater than the produced thrust of test pressure, thereby in the utilization, small-size pressure testing machine can carry out pressure test to high-pressure heavy-calibre welded end valve, and ensure that the pressure test of valve satisfies standard and user's requirement, do benefit to and reduce experimental and maintenance cost, improve test efficiency.
Description
Technical Field
The utility model belongs to the technical field of the valve test, concretely relates to high pressure heavy-calibre welding end pressure testing frock for valve.
Background
The valve is used for opening and closing the pipeline and controlling the flow direction of the pipeline accessory, and can be used for controlling the flow of various types of fluid such as oil, air, water, steam, various corrosive media, slurry, liquid metal, radioactive media and the like. The valve can be classified into a vacuum valve, a low-pressure valve, a medium-pressure valve, a high-pressure valve and an ultrahigh-pressure valve according to the pressing force, wherein the high-pressure valve refers to a valve with the nominal pressure PN of 10.0-80.0 MPa; the valves can also be classified into small-caliber valves, medium-caliber valves, large-caliber valves and extra-large-caliber valves according to the calibers, wherein the large-caliber valves refer to valves with the nominal diameter DN of 350-1200 mm.
The pressure test of the valve in a factory generally adopts one of the following two modes; the first mode is that the pressure test is carried out on the valve through a pressure test machine, the valve is clamped on the pressure test machine through hydraulic pressure or a screw rod by the pressure test machine, and the pressure test machine provides test pressure; the second mode is that pressure test blind plates are arranged at two ends of the valve, and then an external pressure source is used for carrying out pressure test on the valve.
The second mode is only suitable for valves with flange connecting ends, and for valves with high-pressure large-caliber welding ends, the required pressure test blind plate is high in production cost and large in installation difficulty; meanwhile, the connecting end of the high-pressure large-caliber welding end valve is of a structure welded with the sleeve, so that the connecting end is inconvenient to clamp on a pressure test machine, and when the connecting clamping force of the medium and small pressure test machines on the high-pressure large-caliber welding end valve is smaller than the thrust generated by the test pressure, the pressure test cannot be performed on the high-pressure large-caliber welding end valve; therefore, at present, a large-scale pressure tester is generally adopted for a high-pressure large-caliber welded end valve to carry out pressure test. However, the large-scale pressure test machine has high purchase cost, long period and high maintenance cost, and the cost of the pressure test of the high-pressure large-caliber welding end valve is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high pressure heavy-calibre welded end valve is with pressure testing frock aims at solving the inconvenient centre gripping of high pressure heavy-calibre welded end valve on the pressure testing machine, and connects the problem that clamping-force is less than the produced thrust of test pressure.
The utility model provides a technical scheme that its technical problem adopted is: the pressure test tool for the high-pressure large-caliber welded end valve comprises a pressure test back plate, a pull rod, a clamping assembly and a locking member;
the rear end face of the pressure test back plate is a connecting end face, the connecting end face is provided with a concave ring groove and a convex ring platform, the convex ring platform is positioned in the range surrounded by the concave ring groove, and a sealing structure is arranged between the concave ring groove and the convex ring platform; the pressure test back plate is provided with a pressure test hole, and the pressure test hole is positioned in the range surrounded by the convex ring platform; the pull rod comprises a pull rod main body, wherein a first connecting rod is arranged at the front end of the pull rod main body, and a second connecting rod is arranged at the rear end of the pull rod main body;
the clamping assembly comprises an anti-loosening ferrule and a clamping ring component, wherein a first inner step ring is arranged on the rear end face of the anti-loosening ferrule, a second inner step ring is arranged on the front end face of the clamping ring component, the rear end face of the anti-loosening ferrule is attached to the front end face of the clamping ring component, and the first inner step ring and the second inner step ring jointly form an annular groove;
the clamping component is arranged corresponding to the connecting end face of the pressure test back plate, the pull rod is connected with the pressure test back plate through the first connecting rod, and the second connecting rod of the pull rod sequentially penetrates through the anti-loosening ferrule and the clamping ring component and is connected with the locking component.
Further, the pressure test hole, the convex ring table and the concave ring groove are coaxial.
Furthermore, the number of the pull rods is at least two, and the pull rods are uniformly distributed on the connecting end face of the pressure test back plate.
Furthermore, the pull rods are distributed in an annular array by taking the central line of the pressure test hole as the center of the annular array.
Furthermore, the clamping ring component comprises an upper half ring and a lower half ring which are symmetrically arranged, connecting parts are arranged at the corresponding end parts of the upper half ring and the lower half ring, and any two adjacent connecting parts are fixedly connected through a tensioning bolt.
Further, the snap ring component comprises at least three ring bodies, each ring body is enclosed to form a circle, connecting portions are arranged at the end portions, corresponding to each other, of any two adjacent ring bodies, and any two adjacent connecting portions are connected and fixed through the tension bolt.
Further, the sealing structure comprises a first rubber ring.
Further, seal structure still includes piston ring and second rubber ring, the piston ring cover is established on the bulge loop platform, first rubber ring cup joints on the piston ring, the second rubber ring cup joints on the bulge loop platform and is compressed tightly by the internal face of piston ring.
Further, the piston ring comprises a ring main body and a piston ring flange arranged at the rear end of the ring main body, and the first rubber ring is sleeved on the ring main body and is clamped by the front end face of the piston ring flange and the rear end face of the pressure test back plate.
Furthermore, the outer wall surface of the convex ring platform is provided with a sealing ring groove, and the second rubber ring is arranged in the sealing ring groove.
The utility model has the advantages that: the pressure test back plate with the concave ring groove can be matched with the front end of a valve sleeve, the sealing structure arranged between the concave ring groove and the convex ring platform can seal a connecting part after the pressure test back plate is matched and connected with the valve sleeve, meanwhile, the clamping component enclosed with the annular groove can be matched with a flange on a valve welding end, the clamping component arranged on the flange and the pressure test back plate arranged on the front end of the valve sleeve can be connected into a whole through a pull rod, and further, the structure of the connecting end of the high-pressure large-caliber welding end valve can be enhanced and the sealing performance can be ensured, so that the high-pressure large-caliber welding end valve can be clamped on a pressure test machine, and meanwhile, the diameter of the pressure test hole is smaller than the inner diameter of the valve sleeve, therefore, the thrust generated by the test pressure can be reduced, the clamping force of the pressure test machine on the valve is ensured to be larger than the thrust generated by the test pressure, and the middle-pressure test machine can be utilized, The small-sized pressure testing machine can perform pressure test on the high-pressure large-caliber welding end valve, ensures that the pressure test of the valve meets the standard and the user requirement, is favorable for reducing the test and maintenance cost, and improves the test efficiency.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a view in the direction A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the weld end of a high pressure large bore weld end valve;
FIG. 4 is a schematic structural view of the present invention assembled with the welding end of a high pressure large diameter welding end valve;
labeled as: pressure testing backplate 1, pull rod 2, locking ferrule 3, snap ring part 4, retaining member 5, first rubber circle 6, piston ring 7, second rubber circle 8, tie bolt 9, pressure testing machine blind plate 11, valve sleeve 31, flange 32, valve weld end 33.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "front", "back", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description, and do not indicate or imply that the device or component to be referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
With reference to fig. 1 and 2, the pressure test tool for the high-pressure large-caliber welded end valve comprises a pressure test back plate 1, a pull rod 2, a clamping assembly and a locking member 5;
the rear end face of the pressure test backboard 1 is a connecting end face, a concave ring groove and a convex ring platform are arranged on the connecting end face, the convex ring platform is located in the range surrounded by the concave ring groove, and a sealing structure is arranged between the concave ring groove and the convex ring platform; the pressure test back plate 1 is provided with a pressure test hole which is positioned in the range surrounded by the convex ring platform;
the pull rod 2 comprises a pull rod main body, the front end of the pull rod main body is provided with a first connecting rod, and the rear end of the pull rod main body is provided with a second connecting rod;
the clamping assembly comprises an anti-loosening ferrule 3 and a clamping ring component 4, a first inner step ring is arranged on the rear end face of the anti-loosening ferrule 3, a second inner step ring is arranged on the front end face of the clamping ring component 4, the rear end face of the anti-loosening ferrule 3 is attached to the front end face of the clamping ring component 4, and the first inner step ring and the second inner step ring jointly form an annular groove;
the clamping component is correspondingly arranged with the connecting end face of the pressure test back plate 1, the pull rod 2 is connected with the pressure test back plate 1 through the first connecting rod, and the second connecting rod of the pull rod 2 sequentially penetrates through the anti-loosening ferrule 3 and the clamping ring component 4 and is connected with the locking component 5.
As shown in fig. 3 and 4, when the pressure test tool is used, the pressure test back plate 1 is matched with the front end of the valve sleeve 31 through the concave ring groove, and the sealing structure is sealed between the convex ring platform and the valve sleeve 31 to ensure the sealing performance of the matched connection part and prevent the test medium from leaking; the clamping assembly is matched and installed with a flange 32 on a valve welding end 33 through an annular groove, specifically, a first inner step ring of the anti-loosening ferrule 3 is matched with the front end of the flange 32, and a second inner step ring of the clamping ring component 4 is matched with the rear end of the flange 32; then the clamping component and the pressure test back plate 1 are connected into a whole and tensioned through the pull rod 2, the anti-loosening ferrule 3 and the snap ring component 4 which are simultaneously penetrated on the second connecting rod are compressed by the locking piece 5, so that the rear end face of the anti-loosening ferrule 3 is tightly attached to the front end face of the snap ring component 4, the structure of the connecting end of the high-pressure large-caliber welding end valve can be enhanced, and the sealing performance is guaranteed, therefore, the high-pressure large-caliber welding end valve assembled with the pressure test tool can be clamped on a pressure test machine conveniently for pressure test, the installation difficulty is reduced, the clamping stability is improved, and the welding part of the high-pressure large-caliber welding end valve and the thinner valve sleeve 31 can be protected.
In the test process, the test medium acts on the pressure test back plate 1D1To D2The thrust between the regions is transmitted to the flange 32 of the valve welding end 33 through the pull rod 2 and the clamping ring component 4, the thrust generated by the part of test medium does not act on the pressure testing machine, and the pressure testing of the test medium is greatly reducedThe thrust of the machine ensures the safety of the pressure test.
According to the medium thrust formula F in the valve pressure test, the formula is P multiplied by D2The x π/4 is calculated: when the pressure test tool is adopted to assist the high-pressure large-caliber welding end valve to carry out a pressure test, the thrust F generated by the test medium actually born by the pressure test machine is P multiplied by D1 2X pi/4, due to the diameter D of the pressure-testing hole1Is smaller than the inner diameter D of the valve sleeve 312Therefore, the thrust generated by the test pressure P is reduced by delta F, wherein delta F is equal to P x (D) when the pressure test tool is used for assisting the high-pressure large-caliber welding end valve to carry out a pressure test2 2-D1 2) X pi/4; therefore, the pressure test tool is used for assisting the high-pressure large-caliber welding end valve to carry out pressure test, the high-pressure large-caliber welding end valve is clamped on the pressure test machine conveniently, the clamping force of the pressure test machine on the valve can be ensured to be greater than the thrust generated by test pressure, and therefore after the pressure test tool is used for assisting, the middle-sized and small-sized pressure test machine can carry out pressure test on the high-pressure large-caliber welding end valve, the pressure test of the valve is ensured to meet the standard and the user requirement, the test and maintenance cost is reduced, and the test efficiency is improved.
The pressure test back plate 1 is one of main components of the pressure test tool and is mainly used for being in sealing fit with the front end of the valve sleeve 31; the pressure test holes on the pressure test back plate 1 are used for passing test media, and when the pressure test back plate is assembled with a pressure test machine, a pressure test machine blind plate 11 is usually arranged at the front ends of the pressure test holes, as shown in fig. 4; the front end of the valve sleeve 31 is usually processed into a welding groove structure, and the concave ring groove on the pressure test back plate 1 is usually processed into a conical ring groove structure matched with the front end of the valve sleeve 31, so as to prevent the valve sleeve 31 from deforming under the action of internal pressure and the pull rod 2. The pressure test back plate 1 can be of various structures, and is preferably of an annular end cover structure; in order to improve the stability of the assembly, the pressure test hole, the convex ring table and the concave ring groove are preferably of a coaxial structure.
The pull rods 2 are mainly used for connecting the clamping assembly and the pressure test back plate 1 into a whole and tensioning the whole, and the pull rods 2 are usually arranged on at least two connecting end faces of the pressure test back plate 1 and are uniformly distributed on the connecting end faces; in order to improve the connection stability and further strengthen the structure, and as shown in fig. 1 and 2, a plurality of pull rods 2 are symmetrically distributed up and down on the horizontal plane where the central line of the pressure test hole is; preferably, the plurality of tie rods 2 are distributed in an annular array with the central line of the pressure test hole as the center of the annular array.
The clamping component is one of main parts of a pressure test tool and is mainly used for being matched and installed with a flange 32 on a valve welding end 33; the anti-loose collar 3 is mainly intended to fit over the front end of the flange 32 to prevent loosening of the clamping assembly; the clamping ring component 4 is mainly used for being installed at the rear end of the flange 32 in a matched mode, so that the flange 32 is clamped by being matched with the anti-loosening ferrule 3, the problems of looseness, deformation and the like of a clamping assembly are prevented, and the flange 32 can be enabled to bear the tensile force generated by a pressure test tool in a pressure test.
To facilitate mounting of the collar member 4 to the valve weld end 33, it is typically designed as a split construction; preferably, as shown in fig. 2, the clasp part 4 includes an upper half ring and a lower half ring which are symmetrically arranged, the ends of the upper half ring and the lower half ring corresponding to each other are provided with connecting parts, and any two adjacent connecting parts are connected and fixed through a tightening bolt 9.
When the size of the valve welding end 33 is large, the clamp ring component 4 can be generally arranged into a structure comprising at least three ring bodies, each ring body is enclosed into a circle, connecting parts are arranged on the end parts of any two adjacent ring bodies corresponding to each other, and any two adjacent connecting parts are connected and fixed through the tension bolt 9.
The sealing structure is mainly used for sealing between the convex ring platform and the valve sleeves 31 so as to ensure the sealing performance of the matching part of the pressure test back plate 1 and the valve sleeves 31; the sealing structure may be of various kinds, for example: seals, gaskets, etc.
Specifically, the sealing structure comprises a first rubber ring 6. In order to improve the sealing effect and facilitate assembly, as shown in fig. 1, fig. 3 and fig. 4, the sealing structure further comprises a piston ring 7 and a second rubber ring 8, the piston ring 7 is sleeved on the convex ring table, the first rubber ring 6 is sleeved on the piston ring 7, and the second rubber ring 8 is sleeved on the convex ring table and is compressed by the inner wall surface of the piston ring 7. The piston ring 7 is used for assisting assembly and ensures that the first rubber ring 6 is not damaged during assembly. The first rubber ring 6 and the second rubber ring 8 are used for isolating the test medium in the valve cavity and preventing the test medium from leaking outside.
In order to ensure that the first rubber ring 6 is not cut and damaged by the welding groove at the end of the valve sleeve 31 during assembly, the piston ring 7 is preferably designed as a ring body and a piston ring flange provided at the rear end of the ring body, and the first rubber ring 6 is sleeved on the ring body and clamped by the front end face of the piston ring flange and the rear end face of the pressure test back plate 1.
In order to facilitate installation of the second rubber ring 8, as shown in fig. 1, a sealing ring groove is formed in the outer wall surface of the convex ring table, and the second rubber ring 8 is arranged in the sealing ring groove.
The locking member 5 is used for being mounted on a second connecting rod of the pull rod 2 to tighten the pull rod 2 and simultaneously make the anti-loosening ferrule 3 and the clamping ring component 4 tightly matched together; the retaining member 5 can be of various types, for example: screws, pins, wedges, nuts, etc.
Referring to fig. 3, when the pressure test tool is assembled, the inner hole d of the valve sleeve 31 is processed, and the processing depth L ensures that the pressure test tool can be installed; the flange 32 on the valve welding end 33 is mainly used for fixing a pressure test tool, and the flange 32 can bear the tension generated by the pressure test tool in a pressure test.
Claims (10)
1. Pressure testing frock for high pressure heavy-calibre welding end valve, its characterized in that: comprises a pressure test back plate (1), a pull rod (2), a clamping assembly and a locking piece (5);
the rear end face of the pressure test back plate (1) is a connecting end face, a concave ring groove and a convex ring platform are arranged on the connecting end face, the convex ring platform is located in the range surrounded by the concave ring groove, and a sealing structure is arranged between the concave ring groove and the convex ring platform; the pressure test back plate (1) is provided with a pressure test hole, and the pressure test hole is positioned in the range surrounded by the convex ring platform; the pull rod (2) comprises a pull rod main body, wherein a first connecting rod is arranged at the front end of the pull rod main body, and a second connecting rod is arranged at the rear end of the pull rod main body;
the clamping assembly comprises an anti-loosening ferrule (3) and a clamping ring component (4), a first inner step ring is arranged on the rear end face of the anti-loosening ferrule (3), a second inner step ring is arranged on the front end face of the clamping ring component (4), the rear end face of the anti-loosening ferrule (3) is attached to the front end face of the clamping ring component (4), and the first inner step ring and the second inner step ring jointly form an annular groove;
the clamping component is correspondingly arranged with the connecting end face of the pressure test back plate (1), the pull rod (2) is connected with the pressure test back plate (1) through a first connecting rod, and a second connecting rod of the pull rod (2) sequentially penetrates through the locking ferrule (3) and the clamping ring component (4) and is connected with the locking component (5).
2. The pressure test tool for the high-pressure large-caliber welded end valve according to claim 1, characterized in that: the pressure test hole, the convex ring platform and the concave ring groove are coaxial.
3. The pressure test tool for the high-pressure large-caliber welded end valve according to claim 1, characterized in that: the number of the pull rods (2) is at least two, and the pull rods are uniformly distributed on the connecting end face of the pressure test back plate (1).
4. The pressure test tool for the high-pressure large-caliber welded end valve according to claim 3, characterized in that: the pull rods (2) are distributed in an annular array by taking the central line of the pressure test hole as the center of the annular array.
5. The pressure test tool for the high-pressure large-caliber welded end valve according to claim 1, characterized in that: the clamping ring component (4) comprises an upper half ring and a lower half ring which are symmetrically arranged, connecting parts are arranged at the end parts of the upper half ring and the lower half ring, which correspond to each other, and any two adjacent connecting parts are fixedly connected through a tension bolt (9).
6. The pressure test tool for the high-pressure large-caliber welded end valve according to claim 1, characterized in that: the clamping ring component (4) comprises at least three ring bodies, each ring body is enclosed into a circle, connecting parts are arranged on the end parts of any two adjacent ring bodies corresponding to each other, and any two adjacent connecting parts are fixedly connected through a tension bolt (9).
7. The pressure test tool for the high-pressure large-caliber welded end valve according to any one of claims 1 to 6, characterized in that: the sealing structure comprises a first rubber ring (6).
8. The pressure test tool for the high-pressure large-caliber welded end valve according to claim 7, characterized in that: the sealing structure further comprises a piston ring (7) and a second rubber ring (8), the piston ring (7) is sleeved on the convex ring platform, the first rubber ring (6) is sleeved on the piston ring (7), and the second rubber ring (8) is sleeved on the convex ring platform and is compressed by the inner wall surface of the piston ring (7).
9. The pressure testing tool for the high-pressure large-caliber welded end valve according to claim 8, characterized in that: the piston ring (7) comprises a ring main body and a piston ring flange arranged at the rear end of the ring main body, and the first rubber ring (6) is sleeved on the ring main body and is clamped by the front end face of the piston ring flange and the rear end face of the pressure test back plate (1).
10. The pressure testing tool for the high-pressure large-caliber welded end valve according to claim 8, characterized in that: and a sealing ring groove is formed in the outer wall surface of the convex ring platform, and the second rubber ring (8) is arranged in the sealing ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123405900.9U CN216483929U (en) | 2021-12-31 | 2021-12-31 | Pressure test tool for high-pressure large-caliber welded end valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123405900.9U CN216483929U (en) | 2021-12-31 | 2021-12-31 | Pressure test tool for high-pressure large-caliber welded end valve |
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| Publication Number | Publication Date |
|---|---|
| CN216483929U true CN216483929U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123405900.9U Active CN216483929U (en) | 2021-12-31 | 2021-12-31 | Pressure test tool for high-pressure large-caliber welded end valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216483929U (en) |
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2021
- 2021-12-31 CN CN202123405900.9U patent/CN216483929U/en active Active
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